Technology · Secure Email
326 websites in the live index use Retarus as of October 2026. Download the full list of Retarus websites with website, company, country and language.
SourceAs of October 28, 2026, TechLeads detects Retarus on 326 websites: 0.19% of Secure Email detections, the 27th most-used of 67 Secure Email technologies we track.
Sample results for Retarus. Description is shown under each title.
| Rank | Website | Title · Description | Company | Country | Language |
|---|---|---|---|---|---|
| #684,364 | grandbelfort.fr | Grand Belfort Communauté d'Agglomération BelfortLe Grand Belfort est une structure de coopération intercommunale du département du Territoire de Belfort et de la région Bourgogne-Franche-Comté. | Grand Belfort | - | en |
| #1,489,243 | aevwl.de | Ärzteversorgung Westfalen-Lippe - ÄVWLAlterssicherung für Ärztinnen und Ärzte? Die ÄVWL ist Ihr zuverlässiger Ansprechpartner und immer für Sie da. Informieren Sie sich jetzt! | - | - | - |
| #1,541,687 | flatexdegiro.com | flatexDEGIRO AG | Overview | - | - | - |
| #2,421,077 | heimat.com | HEIMAT Los Angeles | Members-Only Concept Fitness ClubHEIMAT is a members-only Concept Fitness Club offering an elevated fitness, spa, and dining experience tailored to uplift your body and soul. | HEIMAT | - | - |
| #2,590,275 | chromsystems.com | Chromsystems - Diagnostics by HPLC and LC-MS/MS | - | - | - |
| #2,822,749 | imux.com | Home - Immunic Therapeutics | - | - | - |
| #2,833,233 | enerko.de | ENERKO | - | - | - |
| #2,881,088 | distripark.com | Hurtownia chemiczna online, surowce chemiczne i kosmetyczne - dsitripark.com➤ Hurtowa sprzedaż wysokiej klasy surowców chemicznych ➤ Distripark.com - Solidny partner w chemii dla profesjonalistów! | distripark.com sp. z o.o. | - | - |
| #3,996,863 | bzkf.de | Krebsforschung in Bayern - BZKFFlächendeckende Versorgung für ganz Bayern | - | - | - |
| #4,957,024 | unsere-bauern.de | Unsere Bayerischen Bauern - Landwirtschaft in Bayern | Startseite | Unsere Bayerischen BauernEntdeckt spannende Einblicke in die Arbeit der bayerischen Landwirtinnen und Landwirte sowie verbrauchernahe Tipps zum Genießen in Bayern. | Unsere Bayerischen Bauern e.V. | - | - |
| #5,000,000 | goldsgym.it | Gold's Gym ItalyLa palestra più famosa del mondo sta arrivando a Italia! Vivi la migliore esperienza di allenamento in un'atmosfera unica. Discover the legacy in Milano. | Gold's Gym | - | - |
| #5,000,000 | kreisklinikenkassel.de | Start - Kreiskliniken KasselDie Kreiskliniken Kassel sind ein modernes Gesundheitszentrum, das sich die ganzheitliche medizinische Versorgung zur Aufgabe macht. | Kreiskliniken Kassel | - | - |
| #5,000,000 | alter-fritz.de | Zum Alten Fritz Rostock - Braugasthaus in RostockWir laden Sie zum geselligen Beisammensein ein. Erleben Sie die handwerkliche Braukunst und Kulinarik der Hansestädte. | - | - | - |
| #5,000,000 | heimatbywarisdirie.fr | Home - HEIMAT | - | - | - |
| #5,000,000 | lascintillante.fr | La Scintillante – Les foulées contre le cancer | - | - | - |
| #5,132,451 | einsteinmarathon.de | Einstein-Marathon | - | - | - |
| #6,032,186 | dieffenbacher.com | Dieffenbacher Maschinen- und AnlagenbauOur Fiberforge is the fastest tape laying system in the world! Manufacture ✓ continuous fiber reinforced glass/carbon fiber tapes ➤ Learn more! | - | - | - |
| #6,221,407 | ansorg.com | Ansorg | Experten für Retail-Beleuchtung, Lichtplanung im EinzelhandelIhre Experten für Retail-Beleuchtung. ✅Lichtplanung ✅Innovative Produkte ✅ Hoher Designanspruch ✅ Nachhaltig - Wir haben die Lösung für Retail-Licht | - | - | - |
| #7,389,886 | heliair.eu | HeliAir – Premium Helicopter Maintenance & Services | - | - | - |
| #7,694,227 | biss-interface.com | Home - BiSS InterfaceHigh-performance sensor and actuator systems, particularly in motion control applications. BiSS - Interface | - | - | - |
| #8,397,845 | vincentz.net | Vincentz Network - Ihr Fachverlag in Deutschland - WE VINWir sind einer der führenden Fachverlage in ganz Deutschland. Wir publizieren Zeitschriften, Newsletter, Bücher und Arbeitshilfen. Veranstalten Messen, Kongresse und Seminare. | Together WEVIN - Führender Fachverlag in Deutschland | - | - |
| #9,242,936 | hahn-trafo.com | HAHNHAHN GmbH & Co. KG - Leistung, die Vertrauen schafft. Entdecken Sie eine Vielfalt an Transformatoren, Schaltnetzteile, Zünder und Drossel Serien | - | - | - |
| #9,362,632 | ehrmann.com | Ehrmann Int | From the family, for the family | - | - | - |
| #10,000,000 | ehrmann.se | Ehrmann SE | Från familjen, för familjen | - | - | - |
| #10,000,000 | ehrmann.es | Ehrmann ES | De la familia, para la familia | - | - | - |
Complete Retarus website dataset in CSV. One-time purchase.
Retarus dataset · CSV
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The most-used Secure Email technologies in the TechLeads index, by number of websites. Retarus accounts for 0.19% of Secure Email detections (326 websites).
| No. | Technology | Websites | Share of Secure Email | Relative size |
|---|---|---|---|---|
| 01 | Proton Mail | 114,899 | 65.0% | |
| 02 | CDNS Network | 8,641 | 4.9% | |
| 03 | MailInBlack | 8,618 | 4.9% | |
| 04 | Sophos | 8,476 | 4.8% | |
| 05 | Hushmail | 4,381 | 2.5% | |
| 06 | Skymail | 4,289 |
TechLeads scans public websites and identifies Retarus from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Website counts refresh daily; this page uses data from October 28, 2026. Counts only include websites we have scanned, so they can differ from other providers.
The TechLeads live index currently lists 326 websites using Retarus. Open the sample table on this page or download the lead list.
Retarus is not in the HTTP Archive history extract (about 4,000 names). The live TechLeads catalog still tracks it among 12,000+ technologies.
See related technologies and co-occurrence on this page. Historical competitor charts appear when HTTP Archive covers Retarus.
Companies and websites using Retarus in the TechLeads index include grandbelfort.fr, aevwl.de, flatexdegiro.com, heimat.com, chromsystems.com. The full list of 326 websites, with company name, country and language, is available as a CSV export.
By number of websites in the TechLeads index, the most-used Secure Email alternatives to Retarus are Proton Mail (114,899), CDNS Network (8,641), MailInBlack (8,618).
TechLeads scans public websites and matches Retarus by signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Website counts refresh daily.
| 2.4% |
| 07 | Migadu | 3,694 | 2.1% |
|---|
| 08 | Securence | 2,597 | 1.5% |
|---|
| 09 | SpamTitan | 2,551 | 1.4% |
|---|
| 10 | MailGuard | 2,525 | 1.4% |
|---|
Yes. A one-time Retarus dataset is $29 as a CSV. The Growth plan ($79/mo) covers 10 technologies with recurring exports, alerts and API access.
Top-ranked sites on RetarusRank
Technologies most frequently detected on the same websites as Retarus. Counts are websites in the live index.
Sites where we first detected Retarus, by week (UTC, weeks start Monday). These are newly detected sites, and the counts follow our discovery coverage.
50
sites newly detected in the last 12 weeks
Cloud based managed service for email security.
Our comprehensive database contains 326 websites using Retarus, making it the most complete Retarus sites list available. This Retarus customer websites directory helps businesses detect websites using Retarus and identify potential leads.
Websites using Retarus commonly also use Zendesk, Haravan, Modernizr, Segment, Segment Consent Manager — reflecting typical Retarus technology stacks.
Our Retarus technology detection system scans millions of websites to identify those powered by Retarus. This list of sites with Retarus includes detailed information such as company names, contact details, social media profiles, and website rankings. Whether you're looking for top websites with Retarus or exploring Retarus adoption trends, our database provides comprehensive insights.
Each entry in our Retarus sites list includes valuable data points: domain name, global ranking, company information, contact details, social media links. This makes it easy to detect websites using Retarus and reach out to potential customers or partners.
Get instant access to the full list of sites with Retarus in CSV format. Our dataset includes all 326 Retarus customer websites with complete contact information, perfect for lead generation, market research, and competitive analysis. The data is regularly updated to ensure accuracy and includes the latest Retarus powered websites.
